I’m taking off my hat as an American and putting on my hat as an investor for this post.

That is, I’m putting aside questions like whether the Trump agenda forms a coherent whole, whether Mr. Trump understands much/any of what he’s doing, whether Trump is implementing policies whispered in his ear by backers in the shadows–and why congressmen of both parties have been little more than rubber stamps for his proposals.

My main concern is the effect of his economic policies on stocks.

the tax cut

The top corporate tax rate was reduced from 35% to 21% late last year. In addition, the wealthiest individuals received tax breaks, a continuation of the “trickle down” economics that has been the mainstay of Washington tax policy since the 1980s.

The new 21% rate is about average for the rest of the world. This suggests that US corporations will no longer see much advantage in reincorporating abroad in low-tax jurisdictions. The evidence so far is that they are also dismantling the elaborate tax avoidance schemes they have created by holding their intellectual property, and recognizing most of their profits, in foreign low-tax jurisdictions. (An aside: this should have a positive effect on the trade deficit since we are now recognizing the value of American IP as part of the cost of goods made by American companies overseas (think: smartphones.)

My view is that this development was fully discounted in share prices last year.

The original idea was that tax reform would also encompass tax simplification–the elimination of at least part of the rats nest of special interest tax breaks that plagues the federal tax code. It’s conceivable that Mr. Trump could have used his enormous power over the majority Republican Party to achieve this laudable goal. But he seems to have made no effort to do so.

Two important consequences of this last:

–the tax cut is a beg reduction in government income, meaning that it is a strong stimulus to economic activity. That would have been extremely useful, say, nine years ago, but at full employment and above-trend growth, it puts the US at risk of overheating.

–who pays for this? The bill’s proponents claim that the tax cut will pay for itself through higher growth. The more likely outcome as things stand now, I think, is that Millennials will inherit a country with a least a trillion dollars more in sovereign debt than would otherwise be the case.

One positive consequence of the untimely fiscal stimulus is that it makes room for the Fed to remove its monetary stimulus (it now has rates at least 100 basis points lower than they should be) faster, and with greater confidence that will do no harm.

Two complications: Mr. Trump has begun to jawbone the Fed not to do this, apparently thinking a supercharged, unstable economy will be to his advantage. Also, higher rates raise the cost of borrowing to fund a higher government budget deficit + burgeoning government debt.